Subtraction assignment (-=)
The subtraction assignment (-=
) operator performs subtraction on the two operands and assigns the result to the left operand.
Try it
Syntax
js
x -= y
Description
x -= y
is equivalent to x = x - y
.
Examples
Using subtraction assignment
js
let bar = 5;
bar -= 2; // 3
bar -= "foo"; // NaN
let foo = 3n;
foo -= 2n; // 1n
Specifications
Specification |
---|
ECMAScript Language Specification # sec-assignment-operators |
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